Mensuration Formulas for SSC
and Banking in PDF - Part 1
Mensuration is an important topic for Competitive Exam like SSC CGL, IBPS PO, SBI PO, IBPS
Clerk, SBI Clerk, RBI Exams, Railway Exams, LIC AAO, Campus Placement, MBA exams like
CAT etc. Since the topic of mensuration revolves around some limited concepts, it becomes very
easy to solve these problems if you remember some basic formulas. Hence, we have compiled
some important Mensuration Formulas for SSC and Banking in PDF. You can easily print it and
affix it in your study room. Just give it a glance when you are solving mensuration problems and
you will automatically remember it.
In this sheet of Mensuration Formulas in PDF, we will take different figures and mention all the
important formulas related to it. This way you won’t get confused. We are also including
diagrams so that you can create a mental picture of it and remember it well.
What follows is the part 1 of these Mensuration Formulas for SSC and Banking. Part 1 deals
largely with 2D formulas. You can also download Part 2 from the link given below.
Mensuration Formulas for SSC and Banking in PDF - Part 2
Mensuration Formulas for 2D Figures
1. Mensuration Formulas for RECTANGLE



Area of Rectangle = Length × Breadth.
Perimeter of a Rectangle = 2 × (Length + Breadth)
Length of the Diagonal = √(Length2 + Breadth2)
2. Mensuration Formulas for SQUARE
1|Page



Area of a Square = Length × Length = (Length)2
Perimeter of a square = 4 × Length
Length of the Diagonal = √2 × Length
3. Mensuration Formulas for PARALLELOGRAM


Area of a Parallelogram = Length × Height
Perimeter of a Parallelogram = 2 × (Length + Breadth)
4. Mensuration Formulas for TRIANGLE
2|Page
1
(Base
2
1

Area of a triangle =

For a triangle with sides measuring a, b and c, respectively:
o Perimeter = a + b + c

× Height) = 2 (𝐵𝐶 × 𝐴𝐷)
𝑝𝑒𝑟𝑖𝑚𝑒𝑡𝑒𝑟
2
𝑎+𝑏+𝑐
2
o
𝑠 = 𝑠𝑒𝑚𝑖 𝑝𝑒𝑟𝑖𝑚𝑒𝑡𝑒𝑟 =
o
Area of Triangle, 𝐴 = √𝑠(𝑠 − 𝑎)(𝑠 − 𝑏)(𝑠 − 𝑐)
(This is also known as “Heron’s formula”)
Area of isosceles triangle =
𝑏
√4𝑎2
4
=
− 𝑏2
(Where a = length of two equal side, b = length of base of isosceles triangle.)
3|Page

Area of an equilateral triangle =
√3
4
× 𝑎2
(Where, a is the side of an equilateral triangle)
5. Mensuration Formulas for TRAPEZIUM

Area of a trapezium =
1
2
1
2
× sum of parallel sides × distance between parallel sides
= × (𝐴𝐵 + 𝐷𝐶) × 𝐴𝐸

Perimeter of a Trapezium = Sum of All Sides
6. Mensuration Formulas for RHOMBUS
4|Page
1

Area of a rhombus = 2 × Product of diagonals

Perimeter of a rhombus = 4 × l
(where l = length of a side)
7. Mensuration Formulas for CIRCLE and SEMICIRCLE
In the following formulae, r = radius and d = diameter of the circle
𝜋𝑑 2
4

Area of a circle = πr 2 =


Circumference of a circle = 2πr = πd
Circumference of a semicircle = πr

Area of semicircle =
5|Page
𝜋𝑟 2
2
2𝜋𝑟𝜃
, where
360

Length of an arc =

Area of a sector = 2 × 𝑙𝑒𝑛𝑔𝑡ℎ 𝑜𝑓 𝑎𝑟𝑐 × 𝑟 =
6|Page
1
θ is the central angle in degrees.
𝜋𝑟 2 𝜃
360